MEET Sam the burglar-biting canine crime-fighter.
An intruder picked the wrong house when he sneaked into Valerie Briggs' home on Rose Avenue in Cowlersley.
For he had not reckoned on Jack Russell Sam's hatred of strangers.
Valerie said: "I was in the kitchen cooking dinner, heard a noise in the lounge and so went to see what it was.
"I saw a man with his head stuck around the lounge door peering in."
As soon as he realised he had been spotted, the intruder fled.
But there was no way seven-year-old Sam - who has a reputation for sinking his teeth into strangers - was going to let him escape without punishment.
He chased after the intruder out of the house.
Valerie said: "Sam came back about 10 minutes later with a lot of blood all around his mouth.
"At first I thought he must have been kicked by the man, but could find no sign of an injury or a loosened tooth.
"He must have bitten the burglar - and bitten him badly.
"He could have gone for the man's leg, but he does like to bite bottoms and can jump quite high.
"Yet judging by the amount of blood I'm now wondering if the man tried to fend Sam off with his arm so Sam bit that."
Valerie lives with her blind son, Carl, and his guide dog, Hogan.
She added: "Sam won't let anyone in the house except relatives. Hogan keeps well clear of him too."
The intruder is white, aged 30 to 40, stocky with short black hair and a bald patch. He wore black glasses and carried a holdall.
Contact Pc David Allan on 01484 436664.